Thats the problem. On line 4a of the ATF 5320.1 Form 1 asks...
" Name and Location of Original Manufacturer of
(Receiver) (If prototype, furnish plans
specifications) (See Instruction 2i) "
And line 4g asks for the serial number.
I'm not an SOT manufacturer and if it's a blank (not a 100% receiver), I don't think I can send in the form. Can I? If I put in my info and a serial number I created, wouldn't that be manufacturing without a license?
Want to buy: Tantal Left and Right side selector parts.
I'm no sheep!